Loose-leaf binder.



J. c. DAWSON. LOOSE LEAP BINDER. nrmopnq: run we. 11, 100p.

Patented Aug. 9, 1910.

- drawings, in which U ITED s ATEs PATENT OFFICE.

JAMES C. DAWSQN, GROVES, MISSOURI ASSIGNOB T0SIEBER8E TRUSSELL MANUFACTURING 00.,, A CORPORATION. OF MISSOURI.

oeasoe.

Be it known that I, Janus C. Dawson, a citizen of the United States, and resident of Vebster Groves, county of Louis, and State of Missouri, have invented certain new and useful Improvements in -Loose-Leaf Binders, of which the following is a specification, and which are illustrated in the accompanying ,drawings, forming a part thereof. Y

. The invention relates to that .style of loose leaf books in which the'binding mechanism comprises outwardly bowing 4 curved prongs secured to a back, and flexible side covers; its object being to reinforce the P01? 'tions of the side covers which bear against the prongs :When the book is closedyand itconsists of a demos of the kind referred; to

having in its covers elastically flexible reinforcing strips or plates, preferably of metal, the invention being hereinafter fully described and illustrated in the accompanying Figure 1 is a detail perspectiveof the book when open, portions of the cover being broken away; and Fig. 2 is a detail sectional View of oneof the covers. e

The book comprises a pair of cover plates 10, 11, united. by a back member 12, to which suitable i eaf-holding,mechanism ;is,attached,

such leaf-holding'device comprising the outwardly-curved prongs; 13, 14:, arranged in pairs, as many pairs being employed as may be deenied advisable; the sheets or leaves 15 being impaled upon the prongs in the 'well known manner.

The side plates 10 and 11 are flexible, and are usuallymade a, of leather or fabric. As; showln'there is a filler 16, an outer cm er'lng 17, and a lining 18. The outer cover l'l is shown as extending across the back 12, being a continuous sheet applied to the entire outer surface ofthe book. The back has a lining 19 of fabric or leather, the lining 18 of the side plate overlapping its edges. Interposed Specification of Letters Patent. Application filed Augutll, 1909.; Serial Noj.512,383.

f LOOSE-LEAF mnnnn;

, l a a between the elements of which each of the side strip or plate 20. of hard and flexibly elastic material, such as celluloid, preferably extend ngfrom the top to the bottom of the book. V 1

lVhen the book is closed the side plates bear against the outwardly-curving portions of the prongs 13, 14, and especially when the back is not completely filled with leaves there has been, in books of this character as heretofore made, a serious and ob ect1onable Patented Aug. 9, 1910.

plates is composed, as SllOWllillEtWBGll. the fitller 16 and the back lining 19, there is a indenting zof the sides by the prongs, not

only badly disfiguring the book but resultingjin wear of\both the lining and outer cover'nig and thusQehortening the life of the de-. I vice. This indentation is preventedby the insert 20, while the desired flexibility of the .cover is retained; a

The details ofthe sheet-holding mechanism arenot shown, asthe invention is not dependent-'-thereon but is applicable to any book of "the general character described, without regardto the particular manner in which the impaling prongs are secured or controlled.

I claim as my 1nvention 1. A loose leaf binder comprising, in com- :bination, a back, flexible side plates, and outwardly-bowing lmpahng prongs secured thereto, and a hard andfiexibly elastic filling. plate within the cover adjacent the prongs. l i

2.- A loose leaf binder comprisingiin combination, a bacln'tlexible side plates and outwardly -bowing impaling prongs secured thereto, anda'x'cell-uloid plate located within that port-ion of the cover which bears against the prongs,

7 'JAMES C. DAWSON;

Witnesses: r 5 l F. W. BIS UE, W. S. OLIVER. 

